1566 Icarus (1949 MA)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.8270057286 ± 2.08e-08
Semi-major axis (a)1.0780378356 AU ± 7.96e-10
Inclination (i)22.80322165° ± 4.67e-06
Long. of Asc. Node (Ω)87.95241860° ± 1.45e-06
Arg. of Perihelion (ω)31.43821085° ± 2.76e-06
Mean Anomaly (M)153.07893635° ± 3.50e-06
Mean Motion (n)0.8805646990°/day ± 9.75e-10
Perihelion dist (q)0.18649437 AU ± 2.24e-08
Aphelion dist (Q)1.96958130 AU ± 2.25e-08
Orbital Period1.11931160 yr ± 1.24e-09
NGA Modelr2
A2-4.25335087e-15 ± 1.75e-16 AU/d²
Physical Parameters
H (abs. magnitude)16.53
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.450″
Uncertainty0
Orbit TypeApollo
MOID0.033646 AU
Observations Used1864
Radar Obs Used23
Gaia Obs Used31
Oppositions7
Arc Total1949-2025
First Observation Used1949-06-27
Last Observation Used2025-08-18
Observations (2297)
Date Type RA Dec Mag Band Observatory
1968-06-20 00:40:42 A 15 06 17.13 -04 32 38.5 805
1968-06-20 00:45:10 A 15 06 17.47 -04 33 24.1 805
1968-06-20 01:45:33 A 15 06 22.05 -04 44 18.2 805
1968-06-20 01:48:30 A 15 06 22.26 -04 44 49.1 805
1968-06-20 01:51:28 A 15 06 22.47 -04 45 21.1 805
1968-06-20 02:09:29 A 15 06 23.82 -04 48 32.3 805
1968-06-20 02:12:26 A 15 06 24.06 -04 49 02.6 805
1968-06-20 02:15:24 A 15 06 24.27 -04 49 34.7 805
1968-06-20 03:04:52 A 15 06 27.91 -04 58 14.3 805
1968-06-20 03:44:45 A 15 06 30.96 -05 05 10.5 805
1968-06-20 04:24:39 A 15 06 34.01 -05 12 04.1 805
1968-06-20 05:04:37 A 15 06 37.11 -05 18 54.5 805
1968-06-20 05:44:00 A 15 06 43.87 -05 27 13.2 662
1968-06-20 05:47:09 A 15 06 43.71 -05 27 40.9 675
1968-06-20 05:55:59 A 15 06 44.76 -05 29 14.5 662
1968-06-20 19:22:12 A 15 07 53.93 -07 34 13.5 119
1968-06-20 19:24:55 A 15 07 54.16 -07 34 35.4 119
1968-06-20 19:28:25 A 15 07 54.41 -07 35 03.4 119
1968-06-20 19:31:31 A 15 07 54.71 -07 35 32.9 119
1968-06-20 19:34:15 A 15 07 54.94 -07 35 56.1 119
1968-06-20 19:40:57 A 15 07 55.83 -07 36 54.1 095
1968-06-20 19:53:27 A 15 07 56.66 -07 38 41.0 095
1968-06-20 20:03:00 A 15 07 58.17 -07 38 24.3 051
1968-06-20 20:34:55 A 15 07 59.34 -07 44 33.2 095
1968-06-20 20:36:10 A 15 07 58.76 -07 44 38.8 119
1968-06-20 20:41:40 A 15 07 59.03 -07 45 25.8 119
1968-06-20 20:46:32 A 15 08 00.03 -07 46 09.2 095
1968-06-20 20:46:54 A 15 07 59.48 -07 46 10.2 119
1968-06-20 20:53:26 A 15 08 00.02 -07 47 04.1 119
1968-06-20 21:15:57 A 15 08 02.03 -07 50 14.5 095
1968-06-20 21:22:33 A 15 08 02.37 -07 51 11.4 095
1968-06-20 23:21:33 A 15 08 11.96 -08 07 37.0 012
1968-06-21 00:19:23 A 15 08 15.80 -08 15 26.4 012
1968-06-21 00:21:22 A 15 08 20.33 -08 14 05.2 805
1968-06-21 00:31:45 A 15 08 20.91 -08 15 29.6 805
1968-06-21 00:55:16 A 15 08 22.26 -08 18 39.1 805
1968-06-21 01:19:12 A 15 08 23.66 -08 21 52.1 805
1968-06-21 01:21:38 A 15 08 23.26 -08 22 12.3 822
1968-06-21 01:25:39 A 15 08 23.49 -08 22 43.7 822
1968-06-21 01:29:39 A 15 08 23.68 -08 23 15.3 822
1968-06-21 01:58:06 A 15 08 25.91 -08 27 01.0 805
1968-06-21 02:08:04 A 15 08 26.46 -08 28 20.1 805
1968-06-21 02:19:01 A 15 08 27.04 -08 29 45.8 805
1968-06-21 02:41:59 A 15 08 28.34 -08 32 47.9 805
1968-06-21 02:47:56 A 15 08 28.65 -08 33 33.7 805
1968-06-21 02:51:55 A 15 08 28.91 -08 34 05.1 805
1968-06-21 05:04:07 A 15 08 39.30 -08 52 29.1 693
1968-06-21 05:07:08 A 15 08 39.53 -08 52 51.7 693
1968-06-21 05:07:29 A 15 08 40.25 -08 53 00.9 662
1968-06-21 05:17:30 A 15 08 40.81 -08 54 17.3 662
Radar Observations (40)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1968-06-14 05:30:00 115417.1 3 Hz 2388 -14 -13
1968-06-14 19:00:00 50487.7 4 Hz 7840 -2 -2
1968-06-14 22:20:00 -10324.1 3 Hz 2388 -14 -13
1968-06-14.229167 11541710 100 Hz 2388 252 253
1968-06-14.791667 5048770 400 Hz 7840 254 254
1968-06-14.930556 -1032410 100 Hz 2388 252 253
1968-06-15 03:00:00 -167331.6 4 Hz 7840 -2 -2
1968-06-15 04:30:00 -61207.2 3 Hz 2388 -14 -13
1968-06-15 09:40:00 -104441.9 3 Hz 2388 -14 -13
1968-06-15.125000 -16733160 400 Hz 7840 254 254
1968-06-15.187500 -6120720 100 Hz 2388 252 253
1968-06-15.402778 -10444190 100 Hz 2388 252 253
1968-06-16 01:40:00 -202453.5 3 Hz 2388 -14 -13
1968-06-16 06:30:00 -234710 3 Hz 2388 -14 -13
1968-06-16 10:00:00 -255404.7 3 Hz 2388 -14 -13
1968-06-16.069444 -20245350 100 Hz 2388 252 253
1968-06-16.270833 -23471000 100 Hz 2388 252 253
1968-06-16.416667 -25540470 100 Hz 2388 252 253
1996-06-08 14:00:00 560070 10 Hz 8510 -14 -14
1996-06-08.583333 56007000 1000 Hz 8510 253 253
1996-06-10 14:00:00 153114 10 Hz 8510 -14 -14
1996-06-10.583333 15311400 1000 Hz 8510 253 253
2015-06-13 23:50:00 1123284.559 5 Hz 8560 -14 -14
2015-06-14 00:30:00 70583814.78 20 us 8560 -14 -14
2015-06-14 01:10:00 70272229.12 3 us 8560 -14 -14
2015-06-14 23:30:00 822302.025 5 Hz 8560 -14 -14
2015-06-15 00:00:00 60903291.94 2.5 us 8560 -14 -14
2015-06-16 23:20:00 53984215.88 2.5 us 8560 -14 -14
2015-06-18 00:02:00 58591220.063 0.4 us 2380 -1 -1
2015-06-18 00:58:00 58866141.404 0.4 us 2380 -1 -1
2015-06-18 23:41:00 67308377.46 1 us 2380 -1 -1
2015-06-18.001389 585912200630 4000 us 2380 251 251
2015-06-18.040278 588661414040 4000 us 2380 251 251
2015-06-18.986806 673083774600 10000 us 2380 251 251
2015-06-19 01:37:00 68163275.576 1 us 2380 -1 -1
2015-06-19.067361 681632755760 10000 us 2380 251 251
2015-06-20 00:58:00 79708409.313 2 us 2380 -1 -1
2015-06-20 01:33:00 80022300.658 2 us 2380 -1 -1
2015-06-20.040278 797084093130 20000 us 2380 251 251
2015-06-20.064583 800223006580 20000 us 2380 251 251
Station codes
-14 DSS-14 Goldstone (70-m) -13 DSS-13 Goldstone (34-m) -2 Haystack (37-m) -1 Arecibo (305-m, 1963–2020)